Computer Science
Scientific paper
Sep 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984esasp.217..355s&link_type=abstract
In ESA Achievements of the Intern. Magnetospheric Study (IMS) p 355-358 (SEE N85-24544 14-46)
Computer Science
Earth Ionosphere, Earth Magnetosphere, Electric Fields, Mapping, Coherent Radar, Geos 2 Satellite, Time Dependence
Scientific paper
Electric fields measured by the double probe experiment onboard the geostationary spacecraft GEOS 2 were mapped into the ionosphere and, after transformation into plasma drift velocities, compared with data taken by the ground based radar system STARE. Three different pairs of mapping factors were used: constant factors as for a dipolar magnetic field configuration; mapping factors varying with local time; and factors as function of the local equatorial magnetic field. It is shown that mapping with the latter mapping factors results in good agreement between data measured by STARE and onboard GEOS 2. Hence, the mapping formulas provide an easy and reliable method to map electric fields down to the ionosphere or with reciprocical factors out in the equatorial plane. Constant factors represent not more than a rough first order estimation as the associated error might become considerable.
Nielsen Edward
Pedersen Andreas
Schmidt Rudiger R.
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